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[Feat] (MG_State, MG_Impl/GLImpl): per-target default texture objects (name 0) - binding 0 binds a real per-context default object (the initial binding of every unit/target slot, rebound on delete of a bound texture), so glTexImage*/glTexParameter*/glGetTex* on it work like any texture while glIsTexture(0)/Gen/Delete keep excluding it and TexStorage* rejects it per spec; backends skip image-less defaults as cheaply as the old null slots (DirectGLES per-draw sync/bind loops, DirectVulkan sampler-fallback resolve); also accept the full advertised GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS range in glActiveTexture, allow zero-layer TexImage3DMultisample, and let glTexBuffer(buffer=0) detach - the texture section of GL CTS per-case state reset (gluStateReset) now runs clean

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swung0x48
2026-07-16 23:36:43 -04:00
parent efd7b47388
commit 076cd0d19d
11 changed files with 435 additions and 60 deletions
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MobileGL/MG_State/GLState/TextureState/TextureState.h
+9
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@@ -49,6 +49,12 @@ namespace MobileGL::MG_State::GLState {
void GenerateNames(Uint number, Vector<Uint>& textures);
const SharedPtr<ITextureObject>& CreateTextureObject(Uint index, TextureTarget target);
const SharedPtr<ITextureObject>& GetTextureObject(Uint index);
// The context's default texture object (name 0) for `target`. GL 3.3 core 3.8: texture
// zero names a real, per-target texture object shared by every texture unit; binding 0
// binds it, and image/parameter calls on it must work like on any texture. It is not a
// GenTextures name: it lives outside m_textureObjects (so glIsTexture(0) stays GL_FALSE
// and by-name lookups keep failing for 0) and can never be deleted.
const SharedPtr<ITextureObject>& GetDefaultTextureObject(TextureTarget target) const;
TextureUnit& GetUnitObject(Int unit);
ImageTextureBinding& GetImageTextureBinding(Int unit);
const ImageTextureBinding& GetImageTextureBinding(Int unit) const;
@@ -83,5 +89,8 @@ namespace MobileGL::MG_State::GLState {
Array<ImageTextureBinding, MAX_TEXTURE_IMAGE_UNITS> m_imageTextureBindings;
IndexGenerator<Uint> m_indexGenerator;
UnorderedMap<GLuint, SharedPtr<ITextureObject>> m_textureObjects;
// One default texture object (external name 0) per target, created with the context and
// immortal for its lifetime; the initial binding of every unit/target slot.
Array<SharedPtr<ITextureObject>, (int)TextureTarget::TextureTargetCount> m_defaultTextureObjects;
};
} // namespace MobileGL::MG_State::GLState